1054 Risk of extracolonic cancers for people with biallelic and monoallelic mutations in MUTYH. (September 2015) - Win, A.; Reece, J.; Dowty, J.; Buchanan, D.; Clendenning, M.; Young, J.; Cleary, S.; Cotterchio, M.; Macrae, F.; Baron, J.; Le Marchand, L.; Casey, G.; et al.